Feeding mechanism for mining-machines



(No Model.) 3 Sheets-Sheet y1. W. L. SANDERS.

PENDING MEGIIANISM POR MINING MACHINES. N0. 320,296. Patented June 16, 1885.

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W. L. SAUNDERS. FBEDING MEGIIANISNI IOR MINING MACHINES.

No. 320,296. Patented June 16, 1885.

(No Model.) 3 Sheets-Sheet 3. W. L. SAUNDBRS.

FBEDING MEGHANISM FOR MINING MAGHINES. N0. 320,296. Patented June 16, 1885.

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UNHED STATES WL-LIAM L. SAUNDERS, OF JERSEY CITY, NE\V JERSEY.

FEEDING MECHANISNI FOR lVllNING-lVlACl-IINES.

SPECIFICATION forming part of Letters Patent No. 320,296, dated June 16, 1885.

Application filed March Q1, 1995 To all whom it may concern:

Be it known that I, XVM. L. SAUNDERS, a citizen of the United States, residing at Jersey City, in the county of Hudson and State o'f N ew Jersey, have invented certain new and useful Improvements in Feeding Mechanism for l\Iining-l\Iachines, of which the following is a specification, reference being had to the accompanying drawings.

The presentinvention relates to improvements in devices for imparting the desired motion to the carriage of a chanhelling-machine, or to the drilling apparatus when mounted on a stationary support, while the drilling-engine is in operation, and it consists in providing a small auxiliary steam-engine and connecting the piston thereof with the wheels of the carriage or with a screw-shaft attached to the frame'up'on which the drilling-engine is mounted, said auxiliary engine being preferably located as near as convenient to the main drilling-engine, to which it is connected by suitable piping or hose leading from opposite ends of the cylinder of the drilling-engine to corresponding ends of the auxiliary cylinder or from a separate set of valves controlled by the movement of the drilling-engine. In the simplest form of the apparatus steam enters the cylinder of the auxiliary engine from the cylinder of the drilling-engine, and is exhausted from the said cylinder through the main cylinder, thus dispensing with the necessity of separate steam-chest and valve-actuating devices for the smaller cylinder. The auxiliary engine may, however` be separately and independently supplied with steam, the connections being automatically controlled by the action of the drilling-engine.

In the accompanying drawings, Figure l is an elevation, partly in section, of a channell ing-machine embodying my invention. Fig. 2 is a plan view. Fig. 3 is a View in detail of a modication of the auxiliary cylinder. Fig. 4 is an elevation, partly in section, showing a slightly modified arrangement of the driving apparatus. Fig. 5 is an elevation, partly in section, showing the drilling and feeding engines mounted upon a iixed support. Fig. 6 isa sectional View on the line 6 6 of Fig. 5.A Fig. 7 is a detail View of the cylinder of a drilling-engine provided wit-h a separate set i l l (No model.)

of val ves for operating the auxiliary feedingengines.

Similar letters denote like parts.

A. represents a carriage, and a carryingwheels thereof. which are supported uponv suitable tracks, a.

B is the drilliiw-cngine, which may be of any description whatever, and is to be mounted upon said carriage in the most convenient manner.

b represents the drill or drills, and C is an auxiliary cylinder mounted upon the frame of the carriage in convenient proximity to the drilling-engine B, with which it is connected by hose or tubing D, said connections extending from opposite ends ot' the main cylinder to corresponding ends of the auxiliary cylinder. The exhaust from the auxiliary engine passes through the cylinder of the engine B, or through its parts only, provided the connections D connect with said engine B through its steam-ports. In some instances l provide the cylinder of the drilling-engine with an independent auxiliary steam-valve and set of ports, as shown in Fig. 7, the said ports being connected to the auxiliary cylinder C, through the tubes or hose l), for the purpose et' operating it without exhausting through the main cylinder B, but at the same time in complete subordination thereto.

Upon the axle el" either or both pairs ofthe carrying-wheels is secured a worm-wheel, d, and extending across the frame ol' the carriage is placed a suitably-mouuted shalt, E, which is screw-threaded at c to correspond with the worm-wheel d. The said shaft is also provided with a ratchet, F, which txed thereto, and surrounded by a pawl-piece,]", carrying pawls j", adapted to engage the ratchet, and also provided with spur gear or gears G. The pistonrod of the auxiliary cylinder is continued, forming the bar g, which extends across the carriage, and is supported at its opposite end in suitable guides, H. The bar G is provided at its under side with rack It, which meshes with the teeth of the spur-gear G. \Vith this construction, when the drilling-engine is in operation the driving mediadsteam or compressed air will also reach the auxiliary cylinder, actuating the pistou thereotsimilarly with that ot' the drilling-engine.

Vith each IOO outward movement of the bar g the ratchet, shaft, and worm-gear will be rotated, the pawls f permitting the retraction of said bar and the continuous operation of the auxiliary engine.

I provide the ratchet F with two oppositely-inclined sets of teeth and the pawl-piece f with a double set of pawls, as indicated in Fig. 6, cach set corresponding with one set of the teeth on the ratchet. By locking either set of pawls the direction of motion of the carriage or of the drilling apparatus upon its support can be determined and readily changed when desired.

The device is equally applicable to fixed or stationary channelingmachines, the main and `Vauxiliary engines being mounted on a suitable frame, U U', which is supported upon a bar or couple of tubes, T, which are suitably supported by end pieces, WV, and adjustable feet V, as indicated in Figs. 5 and 6, and substantially as shown and described in Letters Patent No. 299,092, granted to me May 20, 1884, the auxiliary engine being used to turn a nut, N, confined between the frame pieces, and mounted on a screw-threaded shaft, O, said shaft being fixed parallel with the supports T. By providing two pawl-pieces mounted upon a feather ot' the shaft E or upon the nut N, and either capable of being slipped under the rack 71, the direction of the movement can be controlled according to the effect desired, from which it will be understood that the feeding mechanism automatically propels the carriage or the drill apparatus upon its support in the desired direction whenever the drilling-engine is in operation. It will also be found very useful in moving the carriage into position; but for this purpose', if economy of wear is considered, an 'independent supply of steam will be necessary.

The result aimed at may be attained in various ways Without departing from the spirit of my invention. For instance, I may use a common ratchet-dog, connecting thepiston-rod thereto, or the apparatus may be driven by a cylinder taking steam only from one end, the

. piston being retracted by means of aspring or other elastic body. Such a modification is indicated in Fig. 8, J representing the piston and j its retracting-spring, steam being supplied through the hose D, leading from the cylinder of the drilling-engine. Another form is shown in Fig. 4, in which the auxiliary cylinder is provided with a cross-head, K, and the ratchet and pawls are superseded by a crankplate, L, the reciprocations of the piston being thereby converted into continuous rotary motion of the shaft E, worm-wheel d, and carrying-wheels a.

Various other mechanical differences of construction are permissible in practice, the main object being to provide mechanism for automatically feeding the drilling-engine when on a xed support, or the drilling-engine and carriage when so mounted in the direction of the cut, and at aspeed automatically proportioned to the movements of the drilling-engine, as it is of great importance inv stone-channeling that the lateral feed of the cutting-tool should be dependent upon and operated by the reciprocating movement of the tool-as, for instance, if it were not so and the cutting-tool should become bound in the cut, the lateral feed not being interrupted, breakage of the tool or injury to other parts of the apparatus would surely result.

Having thus described my invention, what I claim is- Y 1. A drilling apparatus provided with an auxiliary engine for automatically propelling said apparatnsin the direction of the cut,and steam-connections between the drilling and auxiliary engines, whereby the auxiliary engine is driven only while the drilling-engine is in operation, as set forth.

2. A drill-carriage provided with a separate engine,thc steam-supply whereof is controlled by the movements of the drilling-engine, for automatically propelling said carriage while the drill is in operation, substantially as described.

3. The combination, with a drilling-engine and a movable carriage or iixed support therefor, of an auxiliary engine and steam-connections between the cylinders of the main and auxiliary engines, and means for transmitting the reciprocations of the piston of said auxiliary engine to the carrying-wheels or bearings of the drilling apparatus, substantially-as described.

4. The combination, with a drilling-engine and a movable carriage therefor, of an auxiliary engine, a worm-shaft engaging a wormwheel carried upon one ofthe supporting-axles, and connections between the piston of the auxiliary engine and the worm-shaft, substan` tially as described.

5. The combination, with a drilling-engine and a movable carriage therefor, of an auxiliary engine and connections between the cylinders of the main and auxiliary engines, a worm-wheel fixed to the axle of one of the supporting-wheels, a worm-shaft mounted in proximity to the auxiliary engine, and connections between the piston of said auxiliary engine and the worm-shaft, whereby the reciprocations thereof are conveyed to the wheels of the carriage, which is thereby automatically fed in the direction of the cut during the operation ofthe drilling, substantially as described.

In testimony whereof Ihereto afiix my signature in presence of two witnesses.

WILLIAM L. SAUNDERS.

Witnesses:

FRED. A. PHILLIPS, J. GUYAT.

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